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Fig. 1 | Particle and Fibre Toxicology

Fig. 1

From: A 90-day oral exposure to food-grade gold at relevant human doses impacts the gut microbiota and the local immune system in a sex-dependent manner in mice

Fig. 1

Microscopy analysis of food-grade Au (E175) and Ref-Au particles. A Scanning electron microscopy (SEM) image of Au foils in an E175 water suspension. Scale bar = 100 µm. B EDX spectra of E175 particulate matter showing Au signals from particles and Ni from the nickel grid. C Number distribution histogram of the measured thicknesses of the fragments of Au foils from E175 powder. D Transmission electron microscopy (TEM) image of Au particles in a Ref-Au water suspension. Scale bar = 500 nm. E EDX spectra of Ref-Au particulate matter showing Au signals from particles and Ni from the nickel grid

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